Someone already described the law but I think there should also be a good explanation why it’s not censorship. That explanation in short form is called the paradox of tolerance. If a society strives to be more tolerant they may also end up being tolerant of intolerance. That tolerance of intolerance then prevents society from becoming tolerant, that’s the paradox. So the only real course of action for a tolerant society is to be intolerant of intolerance.
Attacking someone based on their sexuality is intolerance. Thus to be tolerant those attacks cannot be tolerated, hence the law. Why people are calling it “censorship” is because those people want to be intolerant. They cry “censorship” because they’re being prevented of acting out their own form of censorship, the kind where they try for instance to censure someones sexuality. Calling this thing “censorship” is the wording of the right-wing and unless you want to associate with the right I suggest you stop calling it that. It’s not censorship, it’s being intolerant of censorship.